A checked bag has to fit inside 62 linear inches. That is length plus width plus depth, added together. British travel writers call this hold baggage size, the number that decides free check in versus an oversize tag.
That figure is 62 linear inches, or 158 centimeters. Nearly every major US carrier publishes it for a standard checked bag. It is not the height of the suitcase, and not one side of the box.
It is all three outside dimensions added together. Wheels and handles count too. Get that math wrong and a bag that looks fine at home gets pulled aside at the counter.
The 62 linear inch standard, and where it comes from
Delta, American and Southwest all publish the same ceiling for a standard checked bag: 62 linear inches. Delta rounds that to 157 centimeters on its own site. American rounds it to 158.
Both numbers describe the same 62 inches. They are just rounded differently for a metric audience.
This 62 inch line is not a law. No US agency sets checked bag size the way the TSA sets liquid limits. Airlines set it themselves.
Most landed on the same number for a simple reason. The industry group IATA recommends it as a practical ceiling for handling equipment and cargo holds. That is worth knowing before you argue at the counter.
The gate agent is enforcing a company policy, not a federal rule. That policy is published on the carrier’s own baggage page for exactly this reason.
How linear inches are actually calculated
Measure the longest point of each side of the bag: height, width and depth. Add the three numbers together. That total, not any single dimension, is what airlines mean by checked baggage size.
Wheels count. Side handles count. External pockets count too, if they bulge.
Southwest states this outright on its own help page. It tells travelers that wheels and handles should be included when measuring a bag. That detail catches people out constantly.
A suitcase that measures 29 inches tall on the shell alone can measure taller in practice. Measuring over the wheels and the handle housing often adds another inch or two. That gap is exactly where bags slip from legal to oversize.
What 62 inches actually looks like in a suitcase
Suitcase shopping uses a single number, like a 28 inch or 30 inch bag. That number is usually just the shell height. It rarely tells you the linear inch total that airlines actually check.
As a rough rule of thumb, a 25 to 26 inch checked suitcase lands right around 60 to 62 linear inches. That puts it at or just inside the standard limit. A 27 to 28 inch suitcase commonly runs closer to 64 to 68 linear inches once wheels and handles are counted, over the line on most carriers.
A 29 to 30 inch suitcase is the largest size airlines and luggage makers sell. It is almost never inside 62 linear inches. Treat an extra large bag as likely oversize unless the maker states a real linear inch total, not a shell height alone.
Checked baggage size limits by airline
The table below lists only what each carrier states on its own site, confirmed this session. A carrier without a confirmable published figure is left out rather than guessed.
| Carrier | Standard checked size limit | How it is stated |
|---|---|---|
| Delta | 62 inches (157 cm) | Length plus width plus height |
| American Airlines | 62 inches (158 cm) | Length plus width plus height |
| Southwest | 62 inches | Length plus width plus height, wheels and handles included |
| easyJet (hold baggage) | Up to 275 cm total | Length plus width plus height, sold by weight tier instead of a size cutoff |
Notice how far apart the last row sits from the first three. Not every carrier treats checked baggage size the same way. A bag that is oversize on Delta can pass easily on a carrier that sells by weight tier instead.
What happens above 62 inches
Cross the line and the bag does not usually get refused outright. It gets reclassified as oversize. Oversize carries its own separate charge on top of the normal checked bag fee.
Travelers on FlyerTalk have documented exactly this. One poster measured a bag at 66 linear inches. Delta’s answer was flat: the limit is 62, no exception for a few inches over.
The oversize charge applied without debate.
Most airlines stop selling oversize handling somewhere between 80 and 115 linear inches. The exact ceiling depends on the carrier. Past it the bag gets refused entirely.
If your bag is anywhere close to 62 inches, run it through the size checker tool first. Do that before you leave for the airport, not at the counter.
Hold baggage size on international flights
Plenty of international carriers publish the same 62 inch, 158 centimeter figure as the US majors. That is no accident, since it traces back to the same IATA guidance. But it is not universal.
Treating it as a worldwide law is the mistake that catches travelers out. Low cost European carriers often sell hold baggage by weight tier rather than a hard size cutoff. easyJet, for one, allows a combined size of up to 275 centimeters.
That is far beyond the US standard. Its checked bag product is built around weight brackets, not a strict cutoff. Check the specific carrier’s own page for the flight you actually booked.
See the checked baggage overview for how size and weight rules interact across regions.
How to measure your own bag correctly
Stand the bag up the way it would sit at the counter. Measure height from the floor to the very top of the handle housing, not the shell.
Measure width at the widest point, wheels included if they stick out past the shell. Measure depth the same way, at the deepest bulge if a front pocket is packed full.
Add the three numbers together. If the total sits at 60 inches or below, you have real margin.
If it lands at 61 or 62, pack carefully and expect a close look. Flying often with a bag that close to the line adds up. Weigh that against paying an oversize baggage fee every trip.
Common questions
What does 62 linear inches mean in normal suitcase terms?
It means height, width and depth added together, not the single number printed on a suitcase tag. Most bags in the 25 to 26 inch range land close to 62 linear inches. Bags at 28 inches and above usually exceed it.
Do checked baggage size limits include wheels and handles?
Yes. Southwest states this directly, and it is standard practice across the industry. Measure over the wheels and the handle housing, not just the main shell.
What happens if my checked bag is a little over 62 inches?
Most carriers charge an oversize fee rather than refuse the bag, as long as it stays under their absolute maximum. A bag several inches over, like the 66 inch case reported on FlyerTalk, gets the fee applied without exception.
Is hold baggage size the same thing as checked baggage size?
Yes. Hold baggage size is the British English term for the same measurement. Americans call it checked baggage size or checked bag size, and both mean length plus width plus depth.
Do international flights use a different checked baggage size limit?
Many international carriers use the same 62 inch, 158 centimeter figure, but not all of them. Some low cost carriers, easyJet included, publish a larger combined size. They rely on weight tiers instead of a strict size cutoff.
Is a bigger suitcase always oversize?
Not automatically, but it gets more likely past roughly 27 to 28 inches in shell height. Add height, width and depth yourself, or use a size checker. Do not assume a bag is legal just because it looks like one that fit before.
The bottom line: hold baggage size comes down to one sum, not one side. Add height, width and depth, wheels and handles included. Compare that total against 62 linear inches, or whatever figure your specific carrier publishes.
For the fee side of an oversize bag, and for what a standard checked bag includes, start at the checked baggage guide before you pack.